Classification
330 - Economics
333 - Economics of land & energy
370 - Education
320 - Political science
63
600 - Technology
55
363 - Other social problems & services
47
610 - Medicine & health
45
700 - The arts; fine & decorative arts
45
900 - History & geography
29
620 - Engineering & allied operations
27
380 - Commerce, communications & transportation
25
140 - Specific philosophical schools
24
000 - Computer science, information & general works
22
304 - Factors affecting social behavior
20
551 - Geology, hydrology & meteorology
15
630 - Agriculture & related technologies
10
658 - General management
10
100 - Philosophy & psychology
8
300 - Social sciences
7
400 - Language
6
580 - Plants (Botany)
6
581 - Specific topics in natural history
6
720 - Architecture
6
336 - Public finance
5
576 - Genetics & evolution
5
170 - Ethics
4
340 - Law
4
200 - Religion
3
657 - Accounting
3
791 - Public performances
3
360 - Social problems & services; associations
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
612 - Human physiology
1
770 - Photography, photographs & computer art
1